Experimental Study on Heat Storage Defrosting for Air-source Heat Pump under Moderate/Severe Frosting Conditions

The phase-change heat storage device is used as principal low-temperature heat source during defrosting to improve the defrosting capacity of air-source heat pump. Under the moderate/severe frosting conditions, the variations in surface temperature of heat exchanger for outdoor machine, phase-change material temperature, compressor suction and discharge pressure and surface temperature of heat exchanger for indoor machine with defrosting time are experimentally studied to evaluate the defrosting capacity of air-source heat pump using phase-change heat storage device.